Cancer is an all too common diagnosis for cats, and even more so for dogs. Learn about the types, causes, and various treatments for cancer in pets.

Cancer Sections

Cancer is an all too common diagnosis for cats, and even more so for dogs. Approximately one-fourth of all dogs will be diagnosed with cancer in their lifetime. Older dogs have an even higher likelihood of a cancer diagnosis; half of all older dogs will pass away from cancer. Cats are not free from the diagnosis either; feline friends are also heavily at risk for cancer. Cancer in pets, just like cancer in humans, occurs when abnormal cells divide and multiply. It can materialize as tumors, or be spread in the blood or tissue of a cat or dog.

5 Most Common Cancers in Cats

Having feline immunodeficiency virus (FIV) or feline leukemia virus (FeLV) drastically increases the likelihood of your pet being diagnosed with lymphoma. Most cats with FeLV are struck with lymphoma that could be in the intestinal tract or kidneys.

2. Mammary Tumors

A common cancer for older female cats that are over 6 years of age, mammary tumors, or breast cancer, can be drastically reduced if a cat is spayed early in life, particularly before she first goes into heat.

Not all skin changes or lumps are a sign of skin cancer, but many can be cancerous, either malignant or benign. Generally surgical removal is the main form of treatment. Squamous cell carcinoma is one particularly prevalent form of skin cancer in cats, and often develops in the mouth. Adenocarcinoma and melanoma are other forms of skin cancer.

4 Most Common Cancers in Dogs

The cause of lymphoma in dogs is unknown, and the stage of the illness has a sizable impact upon the prognosis. Biopsies, abdominal ultrasounds, and radiographs are performed to find the stage of the lymphoma.

One of the most important symptoms of cancer to watch for is lumps and bumps on your pet’s skin or just below. Also important to look for are any behavioral changes in your cat or dog. A loss of appetite and corresponding loss of weight should always be a concern, and are frequently an indicator of cancer. Vomiting, diarrhea, and unusually colored feces can also be symptoms of cancer. Changes in your pet’s attitude, from a reluctance to exercise or play to an alteration in disposition can also reveal a major health problem.

The treatment for cancer in pets can take the form of surgery, chemotherapy (cancer drugs for dogs and cats), or radiation depending on the form of cancer that your pet has, as well as its stage and severity. In many cases, the goal of treatment is mainly targeted at easing your pet’s symptoms. Unfortunately, treatment of cancer in pets is often not possible, or will only extend a pet’s life by mere months.

Prevention

Some forms of pet cancer can be prevented with the use of vaccinations and by spaying or neutering the cat or dog. Be sure to ask your vet about the history of the vaccine's use--a vaccine that used to be used for FeLV was linked to a type of cancer called fibrosarcoma. The vaccine's makeup has since been changed, but it's always a good idea to ask your veterinarian how long a vaccine has been in use and what possible side effects there may be.

As with cancer in people, both genetics and environmental factors can play a role in determining which pets get cancer, and which avoid it. While it is difficult to pin down the precise causes of cancer, and there is no foolproof prevention method, helping your pets avoid exposure to chemicals and the sun is a smart prevention strategy. Certainly, though, as with humans, there is no foolproof way to ward off a cancer diagnosis and much is unknown about why pets contract the disease.

More on Cancer in Pets

This information is for informational purposes only and is not meant as a substitute for the professional advice of, or diagnosis or treatment by, your veterinarian with respect to your pet. It has, however, been verified by a licensed veterinarian for accuracy.

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